UPDATE 8-Hong Kong police fire rubber bullets to pin back campus protesters

Hong Kong police fired tear gas and rubber bullets on Monday to force back anti-government protesters trying to escape a university where hundreds are holed up with petrol bombs and other homemade weapons amid fears of a bloody crackdown. Dozens tried to flee the Polytechnic University after a night of mayhem in the Chinese-ruled city in which major roads were blocked and a bridge was set on fire and a police officer was shot by a bow and arrow.

Many were arrested near the university on Monday, public broadcaster RTHK reported, while in the nearby commercial area of Nathan Road activists stopped traffic and forced shopping malls and stores to shut. "We've been trapped here for too long. We need all Hong Kongers to know we need help," said Dan, a 19-year-old protester on the campus, as he burst into tears.

"I don't know how much longer we can go on like this. We may need international help." Protesters tried to make another run for it in the afternoon but were met with more volleys of tear gas.

Thirty-eight people were wounded overnight on Sunday, the city's Hospital Authority said. Reuters witnesses saw some protesters suffering from burns from chemicals in jets fired from police water cannons. "Remember you have life in your hands. Why do you need to push us to death?" one person shouted at police from a campus rooftop as protesters wearing gas masks and clutching umbrellas looked for ways to escape.

Police urged protesters to "drop their weapons" and leave. "Police appeal to everyone inside the Polytechnic University to drop their weapons and dangerous items, remove their gas masks and leave via the top level of Cheong Wan Road South Bridge in an orderly manner," they said in a statement.

"They should follow police instructions and must not charge at police cordons." Live video showed protesters with their hands tied behind their backs sitting cross-legged on a road as riot police stood guard in one of the busiest commercial and tourist districts in the former British colony.

Police said they fired three live rounds when "rioters" attacked two officers who were attempting to arrest a woman. No one was wounded and the woman escaped amid a dramatic escalation of the unrest that has plunged the Asian financial hub into chaos for almost six months. Demonstrators angry at what they see as Chinese meddling in Hong Kong's promised freedoms when it returned to Chinese rule in 1997. They say they are responding to excessive use of force by police.

China says it is committed to the "one country, two systems" formula granting Hong Kong autonomy, with the city's police accusations they use undue violence. 'UNJUSTIFIED'

The United States condemned the "unjustified use of force" in Hong Kong and called on Beijing to protect Hong Kong's freedom, a senior official in President Donald Trump's administration said. Chinese soldiers in a base close to the university were seen on Sunday monitoring developments at the university with binoculars, some dressed in riot gear.

Chinese troops in shorts and T-shirts, some carrying red plastic buckets or brooms, emerged from their barracks on Saturday in a rare public appearance to help clean up debris. Chinese troops have appeared on Hong Kong's streets only once since 1997, to help clear up after a typhoon last year.

Asked about the clean-up operation, Chinese Defence Ministry spokesman Wu Qian said their efforts were welcomed by Hong Kong citizens. The Hong Kong garrison “has the determination, confidence and capabilities to safeguard sovereignty, security and development interests of Hong Kong in accordance with the Basic Law and the Garrison Law and to ensure long term prosperity and stability in Hong Kong”, Wu said, speaking on the sidelines of a defence conference in Bangkok.

The Basic Law is the mini-constitution setting the terms for the formula under which the former colony returned to China. The Hong Kong government involved a colonial-era emergency law in October banning faced masks commonly used by protesters. The High Court ruled on Monday the ban was "incompatible with the Basic Law".

'WE NEED TO FIGHT' The city's Cross-Harbour Tunnel, next to the Polytechnic university, linking Hong Kong island to the Kowloon peninsula, remained closed after protesters torched a bridge above the toll booths on Sunday.

Some train services and many roads across the Kowloon peninsula were closed. All schools were shut. As police approached the barricaded front gate of the university in the predawn hours, protesters retreated into the campus and started fires at the gate and a footbridge.

Some protesters discussed trying to leave, while others reinforced barricades and carried boxes of petrol bombs to positions around the complex. Thousands of residents and protesters flocked to districts around the university including Tsim Sha Tsui, Jordan and Yau Ma Tei, to try to penetrate the riot-police lines to rescue the trapped students.

"If we can only hold on until dawn, more might come," said one young activist in the university. University President Teng Jin-Guang said he had brokered a truce with police to allow protesters to leave the campus peacefully, however it was unclear whether a truce was taking effect.

Some of those trapped on the sprawling red-brick campus close to the city's harbour said they would never surrender. "We need to fight until the end. If we don’t fight, Hong Kong will be over," said Ah Lung, 19.

The unrest in Hong Kong poses the gravest popular challenge to Chinese President Xi Jinping since he came to power in 2012. Xi has said he is confident Hong Kong's government can resolve the crisis. Beijing denies interfering in Hong Kong's affairs and has blamed Western countries for stirring up unrest.

Investment bank Goldman Sachs announced that due to “ongoing disruption” in Hong Kong, it was postponing a party at its regional headquarters in the city to mark the firm’s 150th anniversary. CEO David Solomon was due to attend.

(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)